Using encrypted channels to communicate with squid proxy server

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Revision as of 11:44, 2 December 2012 by Saurabh (talk | contribs)

<yambe:breadcrumb self="HTTPS proxy">Squid proxy server configuration|Squid</yambe:breadcrumb>

Using encrypted channels to communicate with squid proxy server

We can use 

https_port 8081 cert=/etc/squid/squid.pem

in 'squid.conf' to allow clients to connect to proxy using SSL, where 'squid.pem' can ge generated using 

openssl req -new -x509 -days 999 -nodes -out squid.pem -keyout squid.pem

We can also use RSA tools provided by openvpn to create a CA and then a server certificate.

On the client side we can use stunnel to tunnel all browser plain-text traffic over SSL to proxyserver, port 8081. Sample stunnel service configuration is 

	[facultyproxy]
	accept=8080
	client=yes
	connect=facultyproxy.iiit.ac.in:8081

We can add above section to '/etc/stunnel/stunnel.conf' file and run stunnel using 'stunnel /etc/stunnel/stunnel.conf' so that stunnel listens on port 8080 on localhost and forwards all incoming connections to facultyproxy on port 8081.

We can also add following options, if we have CA certificate and we want to defy man-in-the-middle attacks via other self-signed certificates. 

	CAfile=/etc/pki/CA/private/ca.crt
	verify=3
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